摘要
以聚乙二醇(PEG)为造孔剂,采用溶胶-凝胶法制备了多孔纳米TiO2粉末,并对样品进行了氮吸附测试和X射线衍射分析。结果表明:煅烧过程中,聚乙二醇的受热分解在TiO2颗粒中形成了4～6nm的中孔结构;600℃煅烧的TiO2样品均呈单一的锐钛矿相结构,且适量聚乙二醇的加入可抑制TiO2粒径的长大。光催化降解罗丹明B表明:催化剂具有很强的氧化能力,适量聚乙二醇的加入可提高TiO2的光催化性能,在本实验进行的条件下,PEG最佳加入量为0.50g。
The porous nano-titania powder samples were prepared by sol-gel method using polyethylene glycol as a pore-forming material,and then the samples were characterized by nitrogen adsorption test and X-ray diffraction analysis.The results showed that many meso-porous structures with 4-6 nm diameters were formed in titania particles because of the decomposition of polyethylene glycol during the calcination process.The samples calcined at 600 ℃ all presented anatase structure,and the growth of crystal size of titania could be restrained because of the addition of polyethylene glycol.Photocatalytic degradation of rhodamine B showed that the nano-titaniat has strong oxidation ability.Adding an appropriate amount of polyethylene glycol could improve the photocatalytic properties of titania.The optimal amount of polyethylene glycol was 0.50 g in our experimental conditions.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2010年第1期158-162,共5页
Journal of Synthetic Crystals
基金
中国科学院知识创新工程青年人才领域前沿项目
关键词
多孔氧化钛
光催化
罗丹明B
porous titania
photocatalysis
rhodamine B
